Reducing-valve.



N. GRAY.

maoucmc VALVE.

APPLICATION FILED JAN.9, 1915.

Patented Mar. 21, 1916.

t TED STATES PATENT orrron NEIL eRAxoE, DAYTON, HIO,.ASSIG1\IOR orFoamy-NINEonmnimnnnnrrrs r0, ALBERT. o. KASMIRSKY, oE'DAYr-omomo.

REDUCING VALVE;

I Specification of Lettershtent.

Applicationfiled January 9, 1915. S.eria:1No..1",3111.

To, all-whom it may concern Be it known. thatvI, N-nm GRAY, a. citizenof the United States, residing at Dayton, 1n the county of Montgomeryand State of Ohio, have invented certainnew, and useful Improvements inReducing-Valves; and I. do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference beinghad to the accompanying drawings, and to the letters andfigures of reference marked thereon, which form a part of. thisspecification.

This invention relates to new and useful improvements in reducingvalves. It is well known that valves of this type are placed'in a pipeline and are instrumental in reducing steam or air under a high pressureon one side of the valve to a low pressure on the otherside of thevalve.

The object of the present invention. isto.

provide a device of this type which is simple in construction andeflicient in operation. To the above endthe device is entirelyspringless and operates entirely automatically when once set.

Referring to the accompanying drawings, Figure 1 is a side elevation ofmy improved reducing valve; Fig. 2 is a section on the line (1-4: of Fig. 1; and Fig. 3 is a detail. sectional view of the connection betweenthe adjusting spindle and the leverage system.

In the specification and drawings, similar reference characters indicatecorresponding parts.

Referring more particularly to the drawings, 1 represents a valve casingprovided with upper and lower valve seats 2 and 3. The valvecasing 1 isprovided with a flange 4'by means of which the valve is connected to ahigh pressure pipe, not shown. The casing 1 is also provided with aflange 5 by means of which the valve is connected to a low pressure pipe6. Adapted to seat on the valve seat 2 is a valve disk 7 which isconnected by a stem 8 with a valve disk 9 adapted to seat on the seat 3.The area of the valve disk 7 is somewhat larger-than the area of thevalve disk 9 which arrangement allows the high pressure medium to tendto elevate the valve disks off of their seats. The valve disks 7 and 9are, however, automatically regulated by the pressure within the pipe 6as follows: Pivotally connected at 10 to the, valve disk7 is a stem-11which extends out of astufiing gland 12, where it is pivotally connectedat 13 toa lever 14 pivotedat 15. Thepivot. 15 is mountedin a bracket 16extending from a frame 1.7 mounted on a valve cap18 attached to thevalve casing 1. The lever 14 is guided at its outerv end by aframe 19which extends fromjthe valve cap 18. WVhenever the lever 14 is rocked,the valve disks 7 and 9 are elevated and lowered. The lever 14is rockedin one direction by, the high pressure medium, such as steam orair, whenthe; valves are opened-and is-rocked in theother directionto close thevalve by apiston 20 mounted in a cylinder 21. The cylinder21 isprovided-with,- aliner 22 and a cap 23 and. is supported by the frames17 and 19. The piston-20 is connected with the lever 14 by a connectingrod 24 pivoted at 25 to the piston and at 26 to a block 27 slidinglymounted inthelever 14. The movement of the piston 20 in one direction iscontrolled by the high pressure medium through the valve disks 7 and 9,the stem 11, the lever 14 and connecting rod 24 but is moved in theopposite direction by the pressure of the medium above the piston in achamber above the piston. The pressure of the medium within the chamber30 is maintained uniform with a pressure within the low pressure pipe 6through the agency of a connecting pipe 28 which is tapped into the pipe6 and the cylinder 21 above the piston 20. The pipe 28 is provided witha valve 29 which may be closed when it is desired to place the reducingvalve out of operation. Whenever the pressure in the pipe 6 elevatesabove a prelever 14 thereby varying the leverage between the piston 20and the valve disks 7 and 9. The block 27 is shifted along the lever 14by an adjusting spindle 31, one end of which is attached to the block 27by a head 32 and a. nut 33 which permits the spindle outer end of thelever 14 by a cap screw 35;

' The same end of the spindle 81 is provided; with a hand wheel 36 bymeans of which the spindle 31 may be rotated. By rotating the hand wheel36, the spindle 31 Will move the block 27 along the lever-14L- toadj-List the'lev erage between the piston 20 and the valve disks 7 andWVhen the block 27 is near the pivot 15', the pressures Will be nearlyequal- 7 ized but the farther theblock 27 is removed from the pivot 15the greaterwill be the ratio between the pressure of'the media on bothsides of the valve. a f It will be seen that by thus constructing areducing valve, a device is secured which "is simple in construction andfeflicientin operation.

I-Iavingdescribed my invention, I claim. 1. In a valve structure of thecharacter specified,the combination of a valve casing,

a stationary cylinder having a'reciprocabl'e piston therein, aconii'nunication between the outlet of said valve casing andsaidocylinder,

an unbalancedvalve in said "casing consists ingoftwo disks unlted to acommonstem and th e area of one beingslightlyjg'reater Witnesses amha(if me sage; a infatuated valve is pivoted, a shiftable fulcrum iblOCkmountediin said lever" andito which the "connecting rod of said pistonis pivoted, and an adjusting screw mounted in said lever and c on nected to said fulcrum block, substantially as specified.

2. In a pressure-reducing valve,'the commounted onsaid frame and arec'iprocable piston therein, afle'ver pivoted to said frame,connecting'rod pivoted to said piston, a slidable member mounted in saidlever and to. which said connectingrod is. pivoted, an adjusting screwconnected .to said slidable member and supported by said lever, a valvecasing uponw'h1ch said frame is supported,

"l bi'natio npf frame, a stationary cylinder the valves 7 and 9 andtheir seats within said casing, and a pivotalconnection between thecommon stemoffsaid valves and said lever, said pivotal connection beingadjacent to the pivotal' connection of'said lever with said frame,substantially as'specified.

in presence of two witnesses. R. MQCARTY, p 7 MATTHEW SEIBLER. l

Copies of this patent may be obtained for five cents each, by addressingthe Commissioners: Ifatents,

Washington, D. 0 V

a In testimony WhereofI aflix my's'gnature,

NEIL GRAY-

